2018 $1 Borobi Coloured Frosted Uncirculated Coin. Across the globe, sporting greats are preparing their minds and bodies for the the 2018 Commonwealth Games. Australia's Gold Coast is preparing a grand celebration of sport, unity, courage and achievement. Excited that this magnificent sporting event is held in his hometown Borobi the unstoppable Koala, the official mascot of the Gold Coast 2018 Commonwealth Games, has teamed with the Royal Australian Mint to mark the Games with this specially minted $1 Coin. Mintage Unlimited. Please contact Adelaide Exchange Jewellers to find out more on this item.